Messages in this thread | | | Date | Wed, 28 Mar 2001 08:53:03 -0600 | From | Dave Kleikamp <> | Subject | Re: 64-bit block sizes on 32-bit systems |
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My turn to chime in.
JFS was designed around a 4K meta-data page size. It would require some major re-design to use larger block sizes. On the other hand, JFS could take advantage of 64-bit block addresses immediately. JFS internally store the block address in 40 bits. (Sorry, file size & volume size are both limited to 4 peta-bytes on JFS.)
At the rate that storage hardware and requirements are increasing, increasing the block size is a short-term solution that is only going to delay the inevitable requirement for 64-bit block addressability. There is a practical limit to a usable block-size. Someone threw out 64K, which seems reasonable to me. -- David Kleikamp IBM Linux Technology Center - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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